Saw-tooth swage



(No Model.)

J. E. EMERSON.

SAW TOOTH SWAGE.

No. 309,534. Patented Dec. 23 1884.

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JAMES E. EMERSON, OF BEAVER FALLS, PENNSYLVANIA.

SAW-TOOTH SWAG E.

.IZBZCIFICATION forming part of Letters Patent NO. 309,534, dated December 23, 1884.

Application filed July 16,1884. (No model.)

To all whom it may concern):

Be it known that I, Janus E. EMERSON, a citizen of the United States, residing at Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Swages ior Saw-Teeth, of which the following is a specification, reference being had therein to the accompanying drawings.

The object of this invention is to produce a simple and at the same time a complete swage for swaging sa\v-teeth, a swage carrying its own hammer, and the hammer so guided that its blow upon the swage is always cil'ective and perfect in its execution; and it consists in the special construction and arrangement of the parts of the swage whereby the object above stated is accomplished. 1

1n the drawings, Figure 1 represents a side view of the swage and in position to be applied to a saw-tooth to swage it to the desired form of cutting-edge, Fig. 2 represents the swage applied to a tooth and the hammer in position to strikeablow upon the swage. Fig. 3 represents the swage in perspective and its lower side. Fig. 4 represents a side view of a saw-tooth swaged, and Fig. 5 represents a swage-head having several swage-mouths of dilterin g angles to fit saw-teeth varying in form.

A represents a swage-head having the swagemouth a, as seen in Fig. 3, and of any desired width. The swage-mouth is formed of the upper lip, a, which acts as a guide upon the top of a saw-tooth, while the upset-lip a is shorter than the upper, and has a greater incline on its sides from points 2 2 to the termination at 3, as seen in Fig. 3, which will give about the same width of point at 8 that the upper lip has at its outer end. The head A has a central longitudinal bore in it from the opposite end from the swage-mouth to receive a guide-rod for the hammer. The guide'rod B is of steel,

perfectly straight, and of the diameter to fit into the bore in the swage-head, as seenin dotted lines,whereitis permanently secured, preferably by pin b, Fi 3; but it may be screwed into the head, or it can be secured to the swagehead by any other known means that will prevent its coming loose from the head.

0 is the hammer, which is made of steel with the proper temper to avoid seriously upsetting itself or the upper face, b,"of the swagehead that receives the blow as the upper face, I), is turned to be at right angleswith the ceuter bore in the swagehead and the guiderod B, and the hammer O has a longitudinal bore, 0, centrally through it to fit and slide freely upon the rod B and strike the swage-head fairly and equally upon its entire surface.

Other constructions for guiding the hammer upon the face of the swage may be adopted without departing from my invention, such, for instance, as having an arm permanently fixed to the swage, and extending a proper distance at a right angle from the swage-head and terminating in a crotch or slotted joint, in

which is pivoted a handle, and the handle eX- tending back parallel, or nearly so, with the fixed arm until it is united permanently to the hammer that gives the blow upon the swagehead, which is done by raising the pivoted handle and hammer a proper distance and then have it fall upon the swage-head. Such construction will produce the same effect upon the swage asit wouldif the hammer were guided by a guide-rod, while in this the hammer is guided by the handle of the hammer working in the crotch-j oint of the swage-arm; but I prefer the guide-rod for guiding the hammer, as it is cheaper in its construction and just as ef fective in its work.

NVith a guide-hammer swage constructed as above described, it matters but little in what position the operator may choose to hold the swage, as the blow is given by-quickly raising the hammer upon the guide-rod and as quickly forcing it upon the swage-head; being guided by the rod, the swage will assume the right position under the blow given by the hammer with relation to the saw-tooth, thus avoiding the usually imperfect swaging by holding the common swage in one hand and striking it with a hand-hammer held in the other hand; for if the swage, in this mode of operation, is not exact, and a blow from a hand-hammer is not spent upon the swagehead in the direct line of its true action, the sawtooth will not be spread in the right direction, and when once wrongly spread it is difficult to hold the swage so as to recover or repair the bad upset or spread of a tooth by a bad or misdirected blow ofthehand-hammer.

Furthermore, when, by the old way of swag;

ing the operator has occasion to change the position of the swage, he is liable to not follow the changed position with the blow from the hammer. Consequently his hand that holds the swage gets the blow instead of the swage, or the head of the swage is struck at an angle, when bad effects follow; but by the use of the above-described guided-hammer swage all such misfortunes are avoided, as the blow of a guided hammer is sure to strike the swage-head every time fair and give its force in the right direction.

In using my swage it is not advisable to use a very heavy hammer or to strike a heavy blow upon the swage, for it is generally known that light oft-repeated blows in swaging saw-teeth have a refining and compacting tendency upon and greatly improve the cutting quality of theteeth, while very heavy blows orcrushing actions tend to separate the particles of steel or split the saw-teeth, causing them to crumble and become dull at their cutting-points.

7 Another advantage in using my guide-hammer swage is that the operator can strike two or'three blows with the guidedhammer to one with a hand-hammer. .Again, the operator has but to look to the placingand holding the swage upon the tooth, paying no attention by sight to the hammer, for if the swage is right the blow of the hammer will also be right.

The guide and hammer can be applied to any hammer-swage by a slight mechanical change.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. A saw-tooth swage composed of head A, having the swage-niouth a, guide-rod B, and sliding hammer 0, all constructed in the manner and for the purposes described.

2. The combination, witha saw-tooth-swage head, A, having the swage-mouth a, of a sliding and guided hammer, G, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES E. EMERSON.

\Vitnesses:

M. P. GALLAN, NEWTON CRA\VFORD. 

